【摘要】 对车身用6005A铝合金FSW对接板材进行了拉伸性能、拉伸疲劳性能试验研究,并与母材进行了对比;对6005A铝合金FSW对接型材进行了拉伸性能、拉伸疲劳性能和三点弯曲疲劳性能试验研究;根据疲劳试验结果,拟合出6005A铝合金FSW对接板材、型材的拉伸、三点弯曲的S-N曲线(R=0.1),并由此得出该结构的疲劳强度;由6005A铝合金FSW对接型材的静拉伸、疲劳拉伸和三点弯曲疲劳载荷作用下的失效位置,证实了FSW接头的可靠性,为结构的设计和使用提供了可靠的试验数据支持。更多还原

【Abstract】 A friction stir welded(FSW) butted aluminium alloy 6005A plate,which is used for train wall sides,was tested under static tensile and fatigue tensile loads.Due to effect of FSW,its static and fatigue strength are lower as compare that with parent material.Full-scale static tensile,fatigue tensile and 3points bending fatigue test were completed on friction stir welded extruded aluminium alloy 6005A.The fatigue behaviors of tensile and bending characterised by S-N curve with a stress ratio of 0.1 were obtained by least square method.The fatigue limits of friction stir welded extruded aluminium alloy 6005A subjected to tensile and bending loading were experimentally established.Furthermore,failure location of such structure under fatigue loading proofs the strength of FSW butt joint.The presented test data provides solid base for design and practical application of the friction stir welded extruded aluminium alloy 6005A.更多还原